feat(dexdex): forward tauri dev console logs to terminal (#282)

## Summary
- forward DexDex WebView `console.*` logs to terminal output in Tauri
development runtime
- keep production behavior unchanged by enabling the bridge only in
development mode with Tauri runtime checks
- add Tauri log plugin wiring on both Rust host and web client side
- sync DexDex docs contracts to reflect the new development logging
behavior

## Changes
- add `@tauri-apps/plugin-log` dependency and lockfile updates
- register `tauri_plugin_log::Builder::new().build()` in Tauri host
runtime
- add `log:default` capability permission for DexDex desktop window
- add `initDevConsoleTerminalBridge()` in app bootstrap
- add `dev-console-terminal-bridge.ts` and tests for level mapping,
no-op without Tauri runtime, and idempotent install
- update DexDex app and project docs:
  - `docs/apps-dexdex-desktop-app-foundation.md`
  - `docs/project-dexdex.md`

## Validation
- `cd apps/dexdex && pnpm test`
- `cargo test` (repository root)
- `cd apps/dexdex/src-tauri && cargo test`

Author: kdy1

apps/dexdex/package.json

@@ -20,6 +20,7 @@
     "@connectrpc/connect-web": "^2.1.1",
     "@tanstack/react-query": "^5.90.21",
     "@tauri-apps/api": "^2.0.0",
+    "@tauri-apps/plugin-log": "^2.8.0",
     "clsx": "^2.1.1",
     "lucide-react": "^0.577.0",
     "react": "^19.0.0",